Hot-air blower



Aug. 17 1926.

A. HOPKINS now AIR BLOWER Filed'April 15, 1926 INVENTOR flyredffopknsATTORNEYS Patented Aug. 17, 1926.

PATENT OFFICE.

ALFRED HOPKINS, OF ALLSTON, MASSACHUSETTS.

HOT-AIR BLOWER.

Application filed April 15, 1926. Serial No. 102,363.

This invention relates to a hot air blower, and has for an object aprovision of simple, durable, efficient means whereby a jet of hot-airof considerable force can be projected from a suitable manipulativedevice.

A further object relates to a construction of blower which is easy tomanipulate whereby a jet of air can be directed readily on any desiredsurface.

The invention is illustrated in the drawlngs of which Figure 1 is avertical longitu inal section through the device.

Figure 2 is a cross-section taken on the line 2--2 of Figure 1;

Figure 3 is a partial longitudinal vertical section taken through aportion of the blower-casing which contains the electrical heatingelement.

The form of the invention shown in the drawingsis a preferred form,although it is understood that modifications in the construction andarrangement of the parts and in the character of the materials used maybe adopted without departing from the spirit of the invention as setforth in the appended claims.

he invention in general comprises a blower-casing the front of which isformed as a nozzle and the rear of which houses a tubular heatingelement, preferably an electrical heating element. Disposed between thenozzle portion and the heating element is an air jet device adapted topermit air under pressure to be blown through a fine orifice toward thenozzle. This air jet device is actuated by a trigger. The entire unit isheld in the hand of the operator by means of a handle and the triggeroperated just like a pistol trigger would be operated. The action of theair jet projected toward the nozzle produces a suction which draws airthrough the rear of the casing past the electrical heating element whereit is heated to the desired degree and then passes out through thenozzle. i

The preferred form of the invention comprises a casing 10, having afront end 11, formed with a portion of reduced diameter to act as anozzle. The rear end of the casing 12 is adapted to house a heatingelement 13 which is preferably of tubular form to permit air to be drawnin through the rear of the Casing and to be projected through thenozzle. A ring 14: fastened to the rear of the casing acts as a supportfor electrical conductors 15 which are fastened to the ring by wrapping16. A nonremovable handle 17 is screwed to the casing and in front ofthis handle a trigger 18 is pivoted at 19. This trigger is adapted toactuate a stem 20 normally disposed in a position shown in Figure 1 byreason of its weight. This stem when projected upward acts on a valvestem 21 to actuate a valve not shown which. is housed within a valvecasing 22 of the Schraeder type. On the lower end of the valve casing anair jet tube 23, having a fine orifice 24 is disposed, this orificedirected toward the nozzle portion. A pipe 25 connects the valve casingwith a source of air under pressure.

In the operation of the device with the unit held in the hand of theoperator, when the trigger 18 is actuated it moves the stem 20 upwardand opens the valve permitting air under pressure to be projectedthrough the orifice 24 toward the nozzle portion 11. This action willproduce a suction which will draw air through the rear of the casing,past the heating element- 13 where it will be heated and then projectedthrough the nozzle portion 11.

e What I claim is 1. A hot air blower which comprises a. hollow casing,the front of which is formed as a nozzle, a tubular heating element inthe rear of the casing, an air jetdevice within the casing, intermediateits length and manipulatable means for actuating the air jet device, theair being projected toward the nozzle to create a suction which willdraw air into the rear of the casing, past the heating element.

2. A hot air blower which comprises a hollow casing the front end ofwhich is formed as a nozzle, an air jet device located within the casingto the rear of the nozzle, a valve mechanism associated with the air jetdevice, a trigger pivoted to the casing for actuating said valvemechanism, a tubuhollow casing the front end of which is formed with anozzle, a tubular heating element disposed at the rear of the casing andmanipulutuble means disposed in the middle of the casing for projectingjet of air under pressure toward the nozzle.

ALFRED HOPKINS.

